<main id="loading-zone" aria-busy="true">
  <p>Loading Level</p>
  <div class="card">
    <label>
      <span class="sr-only">Loading progress</span>
      <progress 
        indeterminate 
        role="progressbar" 
        aria-describedby="loading-zone"
        tabindex="-1"
      >unknown</progress>
    </label>
  </div>
</main>